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Q. How is gas exchange done in flatworms?
Platyhelminthes exchange gases exclusively by diffusion through their body surface. This is only possible because all cells are localized relatively near to the exterior since gases diffuse cell by cell the flat shape of these worms is a feature that allows this kind of respiration.
Which are the glands present in the epidermis of mammals, birds and reptiles? In the epidermis of birds and reptiles there are almost no glands. In mammals there are sweat glan
Define Fats required for underweight - nutritional care? Fats: We know that fats are concentrated source of energy (lg = 9 Kcals). Fats are capable of increasing the energy val
Alteration of Turgor of Guard Cells There are two ways in which the relative turgor of guard cells may be altered. A decrease in osmotic potential or A decre
Grouping of Stem Cells: The range of differentiation “Potency” is an important property of Stem cells & serves as the basis for classifying cells as : Totipotent SCs -capa
The ability to sequence DNA has led to a revolution in molecular biology. a) Describe the principles of DNA sequencing. b) A single sequencing reaction yields at best 1500 ba
Solubility of Gases in water Most gases which are important for biological processes dissolve readily and specially in water. The solubility of any gas in water generally var
The first ever australopithecine fossil was found in 1924 at Taung, South Africa. It was the skull of a 6 year old child showing a mixture of human and ape like features. This a
expanciate the process of oxygen and carbon dioxide exchange in sponges
Q What is the kind of digestive system of echinoderms? Echinoderms present a complete digestive system with anus and mouth. Q. Do sea urchins have teeth? Sea urchins ha
One example of animals having a single opening to the outside that serves both as mouth as well as anus is: 1. Octopus 2. Asterias 3. Ascidia 4. Fasciola Ascidia i
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